Vibrating stool



Feb. 16, 1932. D, E STEVENS ET L 1,845,941

VIBRATING STOOL Filed May 21, 1931 Patented Feb. 16, 193? PATENT OFFICE UNITED STATES DARWIN E STEVENS AND CHARLES E. BROWN, OF DULUTH, MINNESOTA; SAID ASSIGNOR T0 SAID DARWIN E. STEVENS AND SYLVESTER GEO. STEVENS, BOTH OI DULUTH, MINNESOTA VIBRATING STOOL Application filed May 21, 1981.

structure and arrangement 0 parts will appear in the following description of the invention.

Referrin now to the accompanying drawings, forming part of this application, and wherein like reference characters indicate like parts:

Figure 1 is a central vertical section, partly in elevation, of one of our improved vibrating stools; and

Figure 2 is a perspective view of the holding plate.

1 and 2 represent the seat and legs, respectively, of a common bath stool; in this instance there being four legs which are preferably made of sheet metal and carrying removable rubber tips 3 on the lower extremities thereof, which is also common, but in this instance serving to prevent vibration passing to the floor upon which the stool rests.

In order to produce the floating or free feature of the seat it is separated from the upper ends of the legs as by a comparatively thick disc of what is known as sponge rubber, illustrated at 4. The legs are turned at right angles at their upper ends forming a flat shelf-like projection or bearing 5 which is usually spot welded or riveted to the under side of the seat, but here bearing against the under face of the sponge rubber disc 4.

The relative spacing and holding of the legs is accomplished by the bracing members 6 intermediate of the legs and spaced above the lower termini thereof, the under edges of these braces being upwardly arched and Serial No. 588,944.

covered with a rubber member 7 which has formed integral with the lowermost edge thereof comparatively large corrugations as at 8 for the convenient grasping of the member 6 when the stool is held with the seat against the body for example over the abdomen or stomach for transmitting vibrations thereto.

These members 6 are of suflicient strength i and size to prevent the legs from twisting or otherwise becoming disarranged, and the upper angular end 5 of the legs is retained against the under face of the sponge rubber disc 4 as by the thinner sheet of rubber 9 which is placed thereagainst, when the holding plate 10 is attached to the under side of the seat asby the through bolts 11 which extend through the slotted holes 25 in the ends of the portions 14-15, hereinafter described, for holding the motor 12 in place.

This holding plate is substantially circular in form except as to the four opposite sides which come adjacent the ends of the angle portions 5 of the legs where it is straight as at 13, and has a central cut-out portion with the struck up angle members 1415, the portion 14 of said members being of the proper depth so that when the portions 15 are drawn tightly against the under side of the seat 1 they will hold firmly the circumferential edge of said plate memher up against the rubber 9, thus indirectly impinging against the under side of the members 5 of the legs and holding them tightly in position, but permitting the seat to float freely when vibrated.

Now the motor 12, held in position by the bolts 11, depends centrally from the under side of the seat,'and, for an activating element, has applied to the armature shaft 16 thereof the metal eccentric disc 17 which is firmly keyed thereto and at one side of the motor field so that as the motor operates a rapid vibration occurs which is transmitted directly to the seat 1.

Upon two opposite sides of the holding plate are struck out depending lugs 18 providing attaching means for the holding dome 19 which has suitable holes for registration with like holes in the lugs 18 so that when in position surrounding the motor the dome may be fastened to said lugs as by the bolts 20 and may have any number of ventilating holes 21 therein, as desired. However, it is preferredto leave the lower portion of the dome wholly intact that it may catch any oil.leakage or other refuse from the motor which might drip theref1om..

It will be noted that we prefer to use a- U seat member having a central circular depression therein from above filled with cork as at 22, and the entire seat, including the turned down edges thereof, is surrounded by a disc-like resilient cover 23 entirelyoverlapping the lower edge of the annular flange of the seat, and preferably provided with a bead as at 24 thereupon, so that when the stool is grasped by the hands a convenient and pleasing handhold is afforded.

Having thus described our invention, what we claim and desire to secure by Letters Patent, is:

1. A yibrating stool comprising a seat portion, a vibrating element fixed to the under surface of the seat portion, a resilient disc about the vibratingelement and held against the under surface of the seat portion, and legs the upper ends of which are held against the under surface of said disc.

2. A vibrating stool comprising a seat portion, a resilient disc secured to the under surface of the seat, legs the upper ends of which are embedded Within said disc, and a vibrating element fixed directly to said seat portlon.

3. A vibrating stool comprising a seat portion, a resilient disc held against the under surface of said seat portion, legs the upper ends of which bear against the under surface of said disc, a holding plate fixed to the seat and having a downwardly stepped out wardly extending flange for holding the legs and disc in position, and means for vibrating the seat portion.

. 4;. A vibrating stoolcomprising a' seat portion, a pair of resilient discs abutting each other and held against the under surface of the seat portion, legs the'upper ends of which are held between said discs, a holding plate fixed to said seat and having an outwardly extending flange for holding said legs and discs in position, and means for vibrating the seat portion.

In testimony whereof we afix our signa- DARWIN E. srnvnns.

LES E. BROWN.

tures. 

